The US has always been a remarkably mobile country, but new data from the Census Bureau indicate that mobility has reached its lowest level in recorded history.

美国一直是一个流动性很强的国家，但美国人口普查局的最新数据显示，美国的人口流动率已降至有记录以来的最低水平。

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He's doing an A2 (level) in History.

他正在学习A2证书考试的历史科目。

《牛津词典》

The price of gold hit $1058.48 an ounce in the London Bullion Market Thursday local time, which was the highest level in history.

当地时间8日，伦敦黄金交易所金价达到每盎司1058.48美元，创历史新高。

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He had taught college-level history for two years but had never been a college administrator.

FORBES: Unique selling proposition

They are not the outgrowth of a certain culture, history, or level of economic development.

CNN: Savvy authoritarians: Meet the modern strongmen

Glyn received an A in art and design and a B in history AS-level but Es in Welsh and English because he missed the exams to go on Big Brother.

BBC: NEWS | UK | Education | Grandmother, 78, passes A-level